Lawmakers held a ceremonial "pass the gavel" behind closed doors.
The changes will allow American families to communicate with captors and pay ransoms.
Senate Democrats are vowing to block spending bills until they get budget talks.
Blumenthal said the tone was "civil" at the closed-door deposition.
The White House has threatened to veto the measure.
The vote is the latest salvo in the fight over defense spending.
Senate Dems object to keeping sequester caps in place, while boosting a war fund.
Republicans say the department is not cooperating with their Benghazi investigation.
The president defended his strategy day's after the group captured Ramadi.
ISIS' advance has sparked new doubts about the administration's strategy.
Language that could open the door to illegal immigrants serving fell in a 221-202 vote.
Conservatives are hopeful the panel will strip the controversial language from the defense bill.
The changes allow families of captives to offer ransom payments.
The panel gave State until the end of the day to determine if it already had 60 emails.
The House rejected a measure requiring troops to withdraw in 6 months without an AUMF.
Sidney Blumenthal could face as much as 6 hours of questioning.
U.S. forces will also establish a new base in Anbar province.
Obama said the U.S. still did not have a "complete strategy."
Senators are taking up the annual defense policy bill despite a threatened veto.
Sen. Rand Paul blocked senators from speeding up the vote.
Republicans are pressuring the State Department to quickly turn over all Benghazi documents.
Officials called the loss of Ramadi a "setback," but vowed to help retake the city.
House Democrats are lining up against the bill and the White House has threatened a veto.
The panel began its subcommittee markups on Monday, and will finish on Tuesday.